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Heartfelt thanks CarloM. I would never have got there in a month of Sundays.

Thanks CarloM, this is what I did with your gawk proposal to analyse ${0} and populate the variables V_SEVERITY and V_INFO:

V_SEVERITY=`echo ${V_MEM_PARAMETERS} | gawk --re-interval '{...

Ahamed

In all there are 14 arguments. The first 12 arguments are variable in length but are separated by single space characters, so they pose no problems.
Arguments 13 and 14 are optional, when...

Ahamed, CarloM

I still have the same problem in cases 3 and 4 using Ahamed's proposed solution:

If argument 13 is empty, there will be FS+4 spaces + FS (ie 6 spaces in all).
In case three, the...

Thanks for your interest guys:

Below is the script instruction intended to recuperate Arguments 13 (4 cars) and 14 (50 cars).
Arguments 1-12 are variable length and separated by a space.

...

Sorry Franklin52 that doesn't seem to work:

Case 1:
if both $14 and 15 are null ie full of spaces.
I get Arg14=" " and Arg15 has nothing.

Case 2:
if $14="3333" and $15 is null
I get...

NO in fact I have 56 spaces at the end of the record. But the good news is the last two fields are fixed length which is not the case of all the preceding fields. Arg14= 4 cars Arg15=50 cars + 2...

Thanks very much Franklin52, your solution works fine while arguments 14 and 15 are populated. Unfortunately I omitted to mention that these fields are optional.
After testing: if Arg14 and Arg15...

Gooday
I have an argument string that contains 15 arguments.
The first 14 arguments are easy to handle because they are separated by spaces

ARG14=`echo ${ARGSTRING} | awk '{print $14}'`

The...